What support truck weight limits are associated with the TTMA-100?
The TTMA-100 is recommended for use with any support truck weighing 10,000 lb or more. The TTMA-100 is the only TMA design that has utilized a support truck blocked against forward motion to simulate an infinitely heavy vehicle in all of the NCHRP Report 350 required and optional crash tests. All other trailer and conventional TMA systems have utilized a 20,000-lb truck in at least some of their crash tests. Therefore, the TTMA-100 is the only system that can be safely used on support trucks weighing more than 20,000 lb. Note that FHWA does not recommend the use of any TMA system with any support truck weighing less than 10,000 lb due to concern over the potential for high roll-ahead distance that could pose a hazard to workers and others.
